...
For PJ, would you mind giving a link to your BSC filter calculator? ...
It's at the bottom of the SEXy Speaker page:
http://www.bottlehead.com/loosep/S.E.Xy%20speakers.htmlThis is for a 9" cabinet width, just change the 0.033uF capacitor in proportion to the cabinet width, e.g. an 18" cabinet would want 0.066uF. Values are not highly critical - 20% accutracy is probably OK, and a 30% spread is a good range for experimenting to see if another value works better in your room with your speakers.
Many have suggested that cabinets more than 24" wide don't really need a BSC filter. The general-purpose one I built used a pot in place of the top 10K resistor, to adjust how much compensation you actually use. Some larger boxes need less than the full 6dB. Here's the modified circuit:
<pre>
IN ------------------- 0.0012uF -------------- OUT
| |
| V
------- 10k ohm -----
|
|
10k ohm
|
0.033uF
|
GND ------------------------------------------- GND
</pre>
